Chan Drainage LLC

About Us

At Chan Drainage, we specialize exclusively in professional crawl space repair across Marin County, Sonoma County, San Francisco, and the North and East Bay Area. With decades of experience, we resolve the most common crawl space issues — including excess moisture, standing water, mold, musty odors, and structural damage. Our locally owned company delivers affordable crawl space solutions that outperform big-name competitors, both in price and lasting quality.

Comprehensive Services for Bay Area Homes:

Crawl Space Encapsulation & Vapor Barriers
Drainage Solutions & French Drain Installation
Stormwater Management & Foundation Drainage Systems
Sump Pump Installation & Repair
Crawl Space Clean-Up & Mold Prevention
Garage Cleaning & Epoxy Floor Coatings
Installation of Synthetic Moisture Control Products
General Home Repairs & Waterproofing

Whether you're in Berkeley, Oakland, Richmond, Petaluma, Novato, San Rafael, or anywhere in the San Francisco Bay Area, we offer tailored solutions to keep your crawl space dry, clean, and structurally sound.